Event: OTB Club Championship

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Opponent	Rating	Result
Ian D Hunnable	1913	½ - ½
Huw D Jacob	1645	1 - 0
Zoe Veselow	1688	0 - 1
Peter A Nickals	1728	0 - 1
Joseph Rosenberg	1548	1 - 0
Vittorio Nigrelli	1753	0 - 1
Nigel White	1418	1 - 0

performance = (sum(opponents ratings) + 400(wins-losses)) / games

1670 = (11693 + 400 * (3 - 3)) / 7)